The EMA12L1315P170F30D from ECHO Microwave is a Band Pass Filter with Frequency 1.23 to 1.4 GHz, Insertion Loss 3 dB, Rejection 30 dB @ 1209 MHz, Return Loss 12 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA12L1315P170F30D can be seen below.